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Implement ES2024 grouping and resolver builtins

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Basilisk-Dev 2026-05-15 18:17:24 -04:00 • committed by wuggy
commit 1e463a1d16
11 changed files with 313 additions and 25 deletions
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43
js/src/builtin/Promise.cpp
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@ -3673,6 +3673,48 @@ Promise_static_resolve(JSContext* cx, unsigned argc, Value* vp)
return true;
}
// ES2024
// Promise.withResolvers ( )
static bool
Promise_static_withResolvers(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
// Step 1.
if (!args.thisv().isObject()) {
ReportValueError(cx, JSMSG_NOT_CONSTRUCTOR, -1, args.thisv(), nullptr);
return false;
}
RootedObject C(cx, &args.thisv().toObject());
// Step 2.
Rooted<PromiseCapability> capability(cx);
if (!NewPromiseCapability(cx, C, &capability, false))
return false;
// Step 3.
RootedPlainObject obj(cx, NewBuiltinClassInstance<PlainObject>(cx));
if (!obj)
return false;
// Steps 4-7.
RootedValue promise(cx, ObjectValue(*capability.promise()));
if (!::JS_DefineProperty(cx, obj, "promise", promise, JSPROP_ENUMERATE))
return false;
RootedValue resolve(cx, ObjectValue(*capability.resolve()));
if (!::JS_DefineProperty(cx, obj, "resolve", resolve, JSPROP_ENUMERATE))
return false;
RootedValue reject(cx, ObjectValue(*capability.reject()));
if (!::JS_DefineProperty(cx, obj, "reject", reject, JSPROP_ENUMERATE))
return false;
// Step 8.
args.rval().setObject(*obj);
return true;
}
/**
* Unforgeable version of ES2016, 25.4.4.5, Promise.resolve.
*/
@ -5180,6 +5222,7 @@ static const JSFunctionSpec promise_static_methods[] = {
JS_FN("race", Promise_static_race, 1, 0),
JS_FN("reject", Promise_reject, 1, 0),
JS_FN("resolve", Promise_static_resolve, 1, 0),
JS_FN("withResolvers", Promise_static_withResolvers, 0, 0),
JS_FS_END
};